1.

Which of the following are not correct?(i) The basic unit of time is second.(ii) Every object moves with a constant speed.(iii) Distances between two cities are measured in kilometres(iv) The time period of a given pendulum is not constant.(v) The speed of a train is expressed in m/h

Answer»

(i) Correct.

(ii) Not Correct.

(iii) Correct.

(iv) Not Correct.

(v) Not Correct.



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